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Cre 414at rechma fit Page 5 Groundwater Monitoring Report Project No 724 2 August 27,2004 1 ' 2,0 FINDINGS AND DISCUSSION The results of the groundwater sample analyses indicate the following ' Wells MW-1, MW-3, MW-4, MW-5, MW-6, MW-11, MW-104, MW-109, MW-110, MW- 111, and MW-210 did not contain petroleum hydrocarbon contaminants above the laboratory ' reporting limits 1 TPH-G • None of the shallow wells contained TPH-G above laboratory reporting limits • Intermediate wells MW-2, MW-106, MW-107 and MW-108 contained 68 5, 160, 92 1 and 60 2 µg/1 TPH-G, respectively ' • Deep well MW-208 contained 266 µg/1 TPH-G 2 MTBE • Shallow well MW-7 contained 3 9 µg/1 MTBE ' • Intermediate wells MW-106 and MW-107 contained 15 8 and 7 8 µg/1 MTBE, respectively • Deep wells MW-208 and MW-209 contained 3 4 and 119 µg/l MTBE, respectively 3 Benzene • None of the shallow wells contained Benzene above the laboratory reporting limits • Intermediate wells MW-106 and MW-108 contained 0 4 and 0 5 µg/1 Benzene, respectively ' • Deep wells MW-202 and MW-208 contained 2 8 and 0 5 µg11 Benzene, respectively The distribution of groundwater contaminants is summarized as follows ' (Note The Isoconcentration contours are generated utilizing the SURFER® computer modeling program We recognize that computer generated contour maps do not provide the most accurate representation of what is taking place in the field However, even hand- contoured map at best provide a shadow of reality Both need to be looked at as interpretation, not reality} ' 1 TPH-G • None of the shallow monitoring wells contained TPH-G above the laboratory reporting limits, and therefore a contour diagram was not produced. ' • Figure 6 illustrates the distribution of TPH-G in the intermediate wells A localized high is centered in well MW-106 and the concentrations attenuate to the locations of MW-107 &MW-108